Changes in digestive enzyme activities during the early ontogeny of the South American cichlid (Cichlasoma dimerus)     

Toledo-Solís  Francisco Javier  Hilerio-Ruiz  Andrea Guadalupe  Delgadin  Tomás  Sirkin  Daniela Pérez  Di Yorio  María Paula  Vissio  Paula Gabriela  Peña-Marín  Emyr Saul  Martínez-García  Rafael  Maytorena-Verdugo  Claudia Ivette  Álvarez-González  Carlos Alfonso  de Rodrigáñez  Miguel Angel Sáenz 《Fish physiology and biochemistry》2021,47(4):1211-1227

Fish Physiology and Biochemistry - Cichlasoma dimerus is a neotropical cichlid that has been used as a biological model for neuroendocrinology studies. However, its culture is problematic in terms...  相似文献   

Responses of shelter and pet dogs to an unknown human     

Gabriela Barrera  Adriana Jakovcevic  Angel M. Elgier  Alba Mustaca  Mariana Bentosela 《Journal of Veterinary Behavior: Clinical Applications and Research》2010,5(6):339-344

Canine shelters frequently have inadequate living conditions that affect the behavior of dogs. This study compared fear-appeasement and sociability reactions in shelter and pet dogs when they are confronted by an unfamiliar experimenter. Results indicated that shelter dogs used for this study showed more fear-appeasement behavior—tail down, ears down, and crouching—as compared with pet dogs. In addition, shelter dogs quite frequently remained closer to the individual, despite showing signs of fear-appeasement, as compared with pet dogs. Finally, shelter dogs remained near the door of the enclosure less often when compared with pet dogs. This difference might be accounted for by the lack of any attachment bonds among shelter dogs toward their caretakers. These results may be associated to the usual stressful conditions and limited interactions with human beings that may be observed in shelters with scarce resources.  相似文献   

GIS‐based ecological risk assessment for contaminated sites by fish farm effluents using a multicriteria weight of evidence approach          下载免费PDF全文

Claudio Silva  Eleuterio Yáñez  María Laura Martín‐Díaz  Tomás Angel DelValls 《Aquaculture Research》2016,47(2):524-539

In this study, an integrative weight of evidence (WOE) tetrad methodology was developed and used to assess environmental quality and ecological risk at contaminated sites by fish farm effluents using spatial modelling tools [geographical information systems (GIS) and fuzzy logic and multicriteria analysis (MCA)], taking into account the results of four lines of evidence (LOE): the physico‐chemical characteristics of water and sediment, acute toxicity bioassays, biomarkers and the in situ alteration of benthic communities. The methodology was tested in the Rio San Pedro salt marsh creek in southwestern Spain. The proposed approach allowed for a quantitative spatial characterization of ecological risk and a better discrimination based on various types of physical, chemical and biological data. The methodology illustrates how GIS spatial models may be used in conjunction with other tools such as fuzzy logic and MCA to assist in decision‐making processes based on multiple environmental quality criteria and lines of evidence, with the transparency, objectivity and synoptic ability required to address environmental management problems in general and the management of contaminated marine areas affected by fish farms in particular.  相似文献   

Epidemiology of <Emphasis Type="Italic">Oestrus ovis</Emphasis> infection of sheep in northeast Spain (mid-Ebro Valley)     

Maria Jesus Gracia  Javier Lucientes  Miguel Angel Peribáñez  Juan Antonio Castillo  Carlos Calvete  Luis Miguel Ferrer 《Tropical animal health and production》2010,42(5):811-813

Slaughterhouse surveys to determine the prevalence and intensity of larval Oestrus ovis Linnaeus (Diptera: Oestridae) in sheep, were conducted monthly for 1 year in northeastern Spain. The prevalence of O. ovis in 120 sheep in northeast Spain was 84.2%. The monthly prevalence ranged from 62.5% in January to 100% in June and October. Of the 3,831 larvae collected, 3,005 were first instar larvae (78.4%), 744 second instar larvae (19.4%), and 82 third instar larvae (2.1%). The mean larval burden per infected sheep was 37.9, throughout the year although infection was higher in October. The high number of first stage larvae in winter (especially October, November, and December) may be due to a period of slower larval maturation. Third-stage larvae were always present but sometimes in very low numbers compared to the total. According to the results, oestrosis appears to be a serious problem in the region.  相似文献   

Variability of chloroplast DNA in the genus Passiflora L.   总被引：1，自引：0，他引：1  

Inés Sánchez  Fernando Angel  Mikkel Grum  Miriam C. Duque  Mario Lobo  Joe Tohme  William Roca 《Euphytica》1999,106(1):15-26

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Seroprevalence of Ehrlichia canis infections in police dogs in Spain     

A. Sainz  M. A. Tesouro  F. Rodriguez  I. Mayoral  F. Mazzucchelli 《Preventive veterinary medicine》1995,23(3-4):179-182

A seroepidemiological study of Ehrlichia canis was made in police dogs in Madrid (Spain). AntiEhrlichia canis antibodies were detected by indirect fluorescent antibody test for the detection of IgG.

The results obtained (three positive dogs out of a population of 131 animals) represents a seroprevalence of canine ehrlichiosis of 2.29%. This seroprevalence is one of the lowest described for this type of population.

The seroprevalence obtained from hunting dogs kennelled in Madrid in 1993 was 66.7% (24 positive out of a population of 36). Environmental conditions (temperature, humidity, rainfall, etc.) in both populations were very similar. We suggest that these conflicting results are due to the different prophylactic programmes used in these two populations.  相似文献   

Rat, caprine, equine and bovine erythrocyte ghosts exposed to t-butyl hydroperoxide as a model to study lipid peroxidation using a chemiluminescence assay     

Iglesias BF  Catalá A 《Research in veterinary science》2005,79(1):19-27

The aim of the present study was to analyze the time-course of t-butyl hydroperoxide-induced changes in lipid peroxidation, fatty acid composition and chemiluminescence intensity in rat, caprine, equine and bovine erythrocyte ghosts. A relatively high content of arachidonic acid (C20:4 n6) and docosahexaenoic acid (C22:6 n3) was characteristic of the rat erythrocyte ghosts. The fatty acid composition of native erythrocyte ghosts obtained from caprine, equine and bovine was characterized by a high content of oleic acid (C18:1 n9) and a low content of the peroxidable polyunsaturated fatty acids (C20:4 n6 and C22:6 n3). The proportion of linoleic acid (C18:2 n6) was higher in equine and bovine compared to rat and caprine. Increase in lipid peroxidation in rat erythrocyte ghosts was maximal within 12 min of incubation, t-butyl hydroperoxide concentration dependent and was paralleled by a decrease in C18:2 n6, C20:4 n6 and C22:6 n3 and an increase in chemiluminescence formation. Polyunsaturated fatty acids (PUFAs) present in rat erythrocyte ghosts exhibit the highest sensitivity to oxidative damaged and their sensitivity increases as a power function of the number of double bonds per fatty acid molecule. Light emission in caprine, equine and bovine erythrocyte ghosts was very low, t-butyl hydroperoxide concentration-dependent but changes in fatty acid composition were not observed. The main conclusion of this work is that a low unsaturation degree of fatty acids in erythrocyte ghosts of caprine, equine and bovine prevent the lipid peroxidation on those membranes when they are incubated with t-butyl hydroperoxide.  相似文献   

Orbital cellulitis and intraocular abscess caused by migrating grass in a cat     

Tovar MC  Huguet E  Gomezi MA 《Veterinary ophthalmology》2005,8(5):353-356

We report an unusual case of orbital cellulitis in a cat. Drainage via the pterygopalatine fossa and medical treatment were performed. Failure of resolution and loss of ocular structure and visual function with a poor prognosis led to enucleation. During surgery, plant material and purulent exudate were present in the orbit. Histopathology showed an intraocular foreign body of grass that had migrated through the sclera causing a suprachoroidal abscess with choroidal and retinal detachment.  相似文献   

Characterization of a novel activation antigen on porcine lymphocytes recognized by monoclonal antibody 5A6/8     

Doménech N  Bullido R  Alvarez B  Campos E  Rodríguez-Carreño MP  Gómez Del Moral M  Alonso F  Ezquerra A  Domínguez J 《Veterinary research》2004,35(3):339-348

In this report, we describe the characterization of a novel activation antigen on porcine lymphocytes recognized by mAb 5A6/8. This antigen was detected on B and T cells 24 h after treatment with various stimuli. It was also found on alveolar macrophages, and at low levels on untreated monocytes. MAb 5A6/8 precipitated two bands of 45 and 50 kDa under non-reducing conditions, and of 22 and 28 kDa under reducing conditions. The cellular distribution, expression kinetics and/or molecular size of the 5A6/8 antigen differ from those of other known lymphocyte activation antigens. MAb 5A6/8 was able to inhibit lymphocyte proliferative responses driven by different stimuli, suggesting a role for this molecule in the events that lead to lymphocyte activation.  相似文献   

Abomasal ulceration and abomaso-pleural fistula in an 11-month-old beefmaster bull          下载免费PDF全文

Costa LR  Gill MS  Williams J  Johnson AJ  Angel KL  Mirza MH 《The Canadian veterinary journal. La revue veterinaire canadienne》2002,43(3):217-219

An 11-month-old, beefmaster bull presented with anorexia and signs of respiratory disease. Physical examination, thoracic ultrasonography and radiography, and pleural fluid analysis indicated pericarditis and septic neutrophilic pleuropneumonia. Postmortem findings were abomasal adherence to the diaphragm, a fibrotic fistulous tract connecting the abomasum and pleural cavity, granulomatous abomasitis, granulomatous pericarditis, and fibrinonecrotic pleuritis.  相似文献